Pipe attachment for wrenches.



No. 685,87l. Patented Nov. 5, 190i.

W. H. ROBINSON.

PIPE ATTACHMENT FOR WRE'NGHES.

(Application filed June- 6, 1901.)- (No Model.)

Fizz @201- NITED STATES PATENT FFICE.

WILLIAM H. ROBINSON, OF MARION, IOWVA.

PIPE ATTACHMENT FOR WRENCHES.

SPECIFICATION forming part of Letters Patent No. 685,871, dated November5, 1901.

' Application filed June 6, 1901- Serial No. 63,488. (No model.)

To aZZ whom/zit may concern.-

Be it known that 1, WILLIAM H. ROBINSON,

a citizen of the United States, residing at Marion, in the county ofLinn and State of Iowa, have invented certain new and usefulImprovements in Pipe Attachments for Wrenches; and I do hereby declarethe following to be a full, clear, and eXact description of theinvention, such as will enable others skilled in the art to which itappertains to make and use the same.

The object of this invention is to provide a common monkey-wrench with asimple and quickly-applied device for holding pipe,round rods, and thelike.

The nature of the invention will appear from the description and claimsfollowing, reference being had to the accompanying drawings, in which- VFigure 1 is a side view of a device embodying my invention as in use.Fig. 2 is a top View of the same. Fig. 3 is a central vertical sectionof the same. i

In the drawings,Adesignates the outer fixed jaw of a monkey-wrench, andB the movable Jaw.

G is the shank on which the jaw Emoves.

The pipe-holding attachment D has one plane face at D abutting on theinner face of the jaw A and an inclined serrated face D opposite adaptedto grip a pipe or rod, as shown in Fig. 1. This pipe-jaw is held inposition on the shank of the wrench by a pair of upwardly-extending armsD terminating at their upper ends in inwardly-extending lugs D. As seenfrom above, these arms and lugs have diagonal inner faces D which areseparated a distance equal to the diameter of the shank, so that byturning the jaw a short distance the diagonal opening between the jawswill coincide with said shank and the jaw may be attached and detached.

To prevent accidental dislodgment of the pipe-jaw, it may be providedwith a spring E to press on one side of the shank and hold Aside fromthe convenience in attaching and .detaching the device has the furtheradvantage of connecting only with the shank.

Even in the case of old wrenches this shank is usually in fairly perfectcondition, and the attachment will fit it with little or no filing orgrinding. The head A, however, in a wrench that has had much use isalways more or less battered and requires dressing if the pipeattachment is to connect with it.

Having thus described myinvention, what I claim as new, and desire tosecure by Letters Patent, is-

1. A pipe attachment for wrenches, comprising an inclined, serrated jawhaving extended arms to embrace the shank of the wrench, and terminatingin diagonally opposite,inwardly-extendinglugs, substantially asdescribed.

2. A pipe attachment for wrenches, comprising an inclined, serrated jawadapted to abut on the wrench-j aw, and having extended arms to embracethe Wrench-shank, with di agonally opposite, inwardly-extended lugs toengage the top of said shank, the inner faces of said lugs andcoinciding portion of the arms beinginclined, and separated a distanceequal to the thickness of the shank.

3. Apipe-holdingattachment for wrenches, comprising an inclined,serrated jaw, arms extending therefrom, to embrace the wrenchshank,terminal lugs on said arms extending inwardly at diagonally oppositepoints, and separated by a distance equal to the thickness of the shank,and a spring for keeping the attachment in position.

In testimony whereof I affix my signature "in presence of two witnesses.

WILLIAM H. ROBINSON.

Witnesses:

M. H. BURTON, J. M. ST. JOHN.

